linux-kernel - [tip: sched/fifo] sched,rcutorture: Convert to sched_set_fifo

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Message-ID: <159557961998.4006.14486399918150443631.tip-bot2@tip-bot2>
Date:   Fri, 24 Jul 2020 08:33:39 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     paulmck@...nel.org,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: sched/fifo] sched,rcutorture: Convert to sched_set_fifo_low()

The following commit has been merged into the sched/fifo branch of tip:

Commit-ID:     ce1c8afd3f3119ddaddcdff27579f5723f55c75e
Gitweb:        https://git.kernel.org/tip/ce1c8afd3f3119ddaddcdff27579f5723f55c75e
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Tue, 21 Apr 2020 12:09:13 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Mon, 15 Jun 2020 14:10:25 +02:00

sched,rcutorture: Convert to sched_set_fifo_low()

Because SCHED_FIFO is a broken scheduler model (see previous patches)
take away the priority field, the kernel can't possibly make an
informed decision.

Effectively no change.

Cc: paulmck@...nel.org
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Ingo Molnar <mingo@...nel.org>
Reviewed-by: Paul E. McKenney <paulmck@...nel.org>
---
 kernel/rcu/rcutorture.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index efb792e..bbc3c8a 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -889,13 +889,11 @@ static int rcu_torture_boost(void *arg)
 	unsigned long endtime;
 	unsigned long oldstarttime;
 	struct rcu_boost_inflight rbi = { .inflight = 0 };
-	struct sched_param sp;
 
 	VERBOSE_TOROUT_STRING("rcu_torture_boost started");
 
 	/* Set real-time priority. */
-	sp.sched_priority = 1;
-	if (sched_setscheduler(current, SCHED_FIFO, &sp) < 0) {
+	if (sched_set_fifo_low(current) < 0) {
 		VERBOSE_TOROUT_STRING("rcu_torture_boost RT prio failed!");
 		n_rcu_torture_boost_rterror++;
 	}